diff --git a/src/main/java/ca/spottedleaf/moonrise/mixin/random_ticking/BiomeManagerMixin.java b/src/main/java/ca/spottedleaf/moonrise/mixin/random_ticking/BiomeManagerMixin.java
new file mode 100644
index 00000000..8975e6e8
--- /dev/null
+++ b/src/main/java/ca/spottedleaf/moonrise/mixin/random_ticking/BiomeManagerMixin.java
@@ -0,0 +1,18 @@
+package ca.spottedleaf.moonrise.mixin.random_ticking;
+
+import net.minecraft.world.level.biome.BiomeManager;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Overwrite;
+
+@Mixin(BiomeManager.class)
+abstract class BiomeManagerMixin {
+
+    /**
+     * @reason Replace floorMod and double division to optimise the function
+     * @author Spottedleaf
+     */
+    @Overwrite
+    public static double getFiddle(final long seed) {
+        return (double)(((seed >> 24) & (1024 - 1)) - (1024/2)) * (0.9 / 1024.0);
+    }
+}
diff --git a/src/main/resources/moonrise.mixins.json b/src/main/resources/moonrise.mixins.json
index 42e62267..67ee622c 100644
--- a/src/main/resources/moonrise.mixins.json
+++ b/src/main/resources/moonrise.mixins.json
@@ -91,6 +91,7 @@
     "poi_lookup.AcquirePoiMixin",
     "poi_lookup.PoiManagerMixin",
     "poi_lookup.PortalForcerMixin",
+    "random_ticking.BiomeManagerMixin",
     "random_ticking.BiomeMixin",
     "random_ticking.LevelMixin",
     "random_ticking.ServerLevelMixin",